The tensile creep behavior of an oxide-oxide ceramic matrix composite (CMC) was investigated at 1000 and 1100 deg C in laboratory air and steam. The oxide-oxide CMC studied in this research was Nextel(trademark)720/alumina-mullite (N720/AM). The composite consists of N720/fibers with 0 deg/90 deg fiber orientation and a porous alumina-mullite matrix. Tensile-strain behavior was investigated and tensile properties measured at 900, 1000 and 1100 deg C. The effect of loading rate on tensile properties of N720/AM ceramic matrix composite at 1100 deg C in steam was also examined. Creep-rupture tests were performed at 1100 deg C in laboratory air and steam, and at 1000 deg C only in steam.